worldhistoryfacts:A mold for pressing coins from the Qin state during the Warring States period, 475
worldhistoryfacts:A mold for pressing coins from the Qin state during the Warring States period, 475-221 BCE. These round coins with a square hole in the middle (called Ban Liang coins) became the first universal currency in China after the ruler of Qin (Shihuangdi) conquered the other warring states and embarked on a project of standardizing the currency, weights and measures, and writing in China.{WHF} {HTE} {Medium} -- source link